Chicago Heights is a Democratic stronghold. About 75% of voters here vote Democratic and 25% Republican.
About 56% of adults in Chicago Heights typically vote, below the U.S. average of about 62%. Among adults in Chicago Heights, ~42% vote Democratic, ~14% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How Chicago Heights compares
Among cities within 25 miles, Chicago Heights leans more Democratic than 103 of 130 neighbors.
Chicago Heights runs about 40 points more Democratic than Illinois as a whole.
Politics vary noticeably by neighborhood within Chicago Heights. The southwest side is the most Democratic-leaning (D+71) and the southeast side is the least Democratic-leaning (D+34), a spread of about 37 points.
Why Chicago Heights leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Chicago Heights, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in Chicago Heights live in densely developed areas, about 58 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 47% of adults in Chicago Heights have never been married, above 97% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Chicago Heights, IL sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Chicago Heights looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Chicago Heights is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 36% of households in Chicago Heights rent, above 91% of cities. High food insecurity lines up with lower turnout, and about 33% of adults in Chicago Heights report food insecurity, above 97% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- South Chicago Heights, IL D+15
- Olympia Fields, IL D+77
- Park Forest, IL D+69
- Flossmoor, IL D+72
- Glenwood, IL D+74
- Ford Heights, IL D+79
- Steger, IL D+30
- Homewood, IL D+60
- East Hazel Crest, IL D+65
- Sauk Village, IL D+59
Cities with Similar Populations
- Danvers, MA D+12
- Rosharon, TX D+15
- Corsicana, TX R+16
- Temple Terrace, FL D+20
- Eldersburg, MD R+13
- Centereach, NY R+19
- Millsboro, DE R+12
- Batavia, IL D+15
- Rolla, MO R+22
- Crosby, TX R+50
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Sources and methodology
Precinct-level voting records used to fit the model come from Illinois State Board of Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.